Retrieve iCloud email I was sending to the z

Hello Biologicalwarfare,

Welcome to Apple Support Communities. We're unsure of what you're asking, but we'd like to lend a hand to see how we can help. 

If you're trying to unsend an email that was accidentally sent to the wrong recipient, there is no way to recall it after it has been sent.

If you would like to find that email to copy it or resend it to the correct recipient, you can find it in the "Sent" folder.

The more details, the better we can help. Kind regards.

Compose a mail use (use command and N keys ) , in the " To " field you typed incorrect address but didn't sent the mail , click on drop down arrow in front of name and click on edit address , once again type correct mail address and send the mail see the article Add people and companies to Contacts on Mac - Apple Support

In the same way if you message from message application , type the name in the field , the incorrect mail address can be edited ( click on show contact card ) , the address book opens you have to edit the contact Add people and companies to Contacts on Mac - Apple Support

Remove a field and enter correct mail address , click on done to save .

Note : if you didn't send the mail and closed the window and clicked on save as drafts the mail will be found in draft folder .